opera

from The Century Dictionary.

• noun Plural of opus.
• noun A form of extended dramatic composition in which music is an essential and predominant factor; a musical drama, or a drama in music. ; ; ;
• noun The score or words of a musical drama, either printed or in manuscript; a libretto.
• noun A theater where operas are performed; an opera-house.
• noun The administration, revenue, and property of an Italian church or parish.
• noun Specifically, a ballad-opera (see def. 1).

from the GNU version of the Collaborative International Dictionary of English.

• noun A drama, either tragic or comic, of which music forms an essential part; a drama wholly or mostly sung, consisting of recitative, arias, choruses, duets, trios, etc., with orchestral accompaniment, preludes, and interludes, together with appropriate costumes, scenery, and action; a lyric drama.
• noun The score of a musical drama, either written or in print; a play set to music.
• noun The house where operas are exhibited.
• noun light, farcical, burlesque opera.
• noun a partially inclosed portion of the auditorium of an opera house for the use of a small private party.
• noun comic or humorous opera.
• noun a light flannel, highly finished.
• noun (Bot.) an East Indian plant (Mantisia saltatoria) of the Ginger family, sometimes seen in hothouses. It has curious flowers which have some resemblance to a ballet dancer, whence the popular name. Called also dancing girls.
• noun a short telescope with concave eye lenses of low power, usually made double, that is, with a tube and set of glasses for each eye; a lorgnette; -- so called because adapted for use at the opera, theater, etc.
• noun a gentleman's folding hat.
• noun specifically, a theater devoted to the performance of operas.
• noun serious or tragic opera; grand opera.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun music A theatrical work combining drama, music, song and sometimes dance.
• noun music The score for such a work.
• noun A building designed for the performance of such works; an opera house.
• noun A company dedicated to performing such works.
• noun by extension Any showy, melodramatic or unrealistic production resembing an opera.
• noun A collection of work (plural of opus).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a commercial browser
• noun a drama set to music; consists of singing with orchestral accompaniment and an orchestral overture and interludes
• noun a building where musical dramas are performed